剔除重复记录，只保留一条
日期：2014-05-16 浏览次数：20462 次
删除重复记录，只保留一条
delete from `tieba` where id in (select id from (SELECT *,count(`name`) as num FROM `tieba`group by `name`) as b where num>1)
delete from `tieba` where id in (select id from (SELECT *,count(`name`) as num FROM `tieba`group by `name`) as b where num>1)
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